Height gauge



.A. J. METRO HEIGHT GAUGE Oct. 2, 1945.

Filed Jan. 17, 1944 Ai 1 1 v G I H IN VEN TOR.

BY I ANTHONY J.METRO 2-...

v ATTORNEYS Patented Oct. 2, 1945 The; present 'inventionrelates to height *gaugesr and has. among its objects :a height gauge-lwhi'chri in itself. may be used -tfor a'ccurate" measurement.

Another object is a height gauge which may be:

used in. conjunction with measuringiblocks; there by gaining'in flexibility of operatio'noverthe conventional.heightcgau gs Still another object :is a heighti gauge -which may be: made more cheaply than the conventional gauge without-sacrificingrany of its accuracy;

Otherobjectsfand advantages -will 'be apparent v to those iskilled in the artup'on reference to the followingdescription. Wand :.the accompanying:

drawing in which a Figure. 1 isJan? elevational view' of a height gauge constructed accordingto: the presentitjn;-,.

ventionf- Figure- '2 is a .vertical centralisectional view of: I

the gauge of Figure '1.

Figure 3nis a view similar-to Figure 2 f some what modifiedform "of'thegauges, and Y Figure' l is a plan view-of one of the movable plates, showing the locking means.

As indicated in the drawing, the gauge comprises a cylindrical standard I0, preferably hardened and ground, set in a suitable circular base I I, the bottom of which is faced and ground accurately normal to the axis of standard I0. The standard I0 is provided with a number of V-grooves I2, evenly spaced at one inch or other desired distance. If the metric system is to be used, the grooves are, of course, spaced the desired number of centimeters and other proportions arranged accordingly.

Mounted to have a snug sliding fit on the standard I0 is a sleeve I5 threaded on the outside with a conventional micrometer thread. This sleeve I5 is fixed as by screws IT, to a thimble I 6, which extends over but is spaced from the sleeve I5, and is provided with a radially inserted thumbscrew I8, this latter being provided with a pointed end adapted to fit into a groove I2 and fix the sleeve I5 and thimble I6 at the desired position on the standard and lock them against rotation.

[Also mounted with a snug sliding fit on the standard I0 is a circular plate provided centrally with a sleeve 2| internally threaded and of such thickness as to enter the space between thimble I6 and sleeve I5 and coast with the thread on the latter. On the outer surface of thimble I6 at the lower edge, which is preferably beveled as shown at ISA, are provided vertically arranged graduation lines, the perimeter being equally divided into twenty-five equal spaces as is the practice with micrometers, while the outer surface of sleeve -2I :is providedwith"gra'duations of .short circum-ferentia'lly.arranged lines. numbered ingroups of fourin micrometers."

Itiawill the noted that. the: graduationson -the thimble "I 6 and: those .'on"sleevei 2 I are numbered so as to provide two "scales :Irea'din'g on a reverse it relation. ;This is =to provide for-the use :of the parts: I5, I6; and 2mm either the position-shown in Figure -1,or an inverted position.

In producin'gtthe gauge," the ports -will pref-' era-blyloe sozproportioned that, when the'isliding assembly is in a position whereinth'e'screw "is I. in -:the lowest groove I 2 land when: the sleeve 2 I" is ;fully screwed I in. (to 0) 'thedistance-between the top of disc 20 and the bottombf; base II is an exact unit of distanceysay one inch. Also in orderlto provide the same accuracy in a reversed position, the-distancebetween the axis of screw I 8 and the upper surface of thimble I6 must be exactly. one-half the thickn'ess of disc 20; When" thisi's done, the exact height of the'top of disc 20,; when the slider is-inany position, may--be*-as certained by noting the groove I2 being used, and then subtracting the reading at the thimble. If the slider is reversed, the thimble reading must be added.

In order to fix the plate or disc 20 in its accurately adjusted position, clamping or locking means such as is shown in Figure 4 may be provided. In this figure, the disc 20 is shown as provided with a countersunk around its central opening and in this is accurately fitted a, split ring 39 held in place by means of a screw 3|. Extending in edgewise of the disc 20 through the split portion 32 of the ring 3'0 is a thumbscrew 33 which passes loosely through the one portion of the ring and is threaded in the other. Further, the screw 33 is preferably provided with a pilot end 34 adapted to extend on into a suitable drilled hole in the disc beyond the ring. Tightening of screw 33, causes the ring-30 to clamp the standard I0 and hold the disc 20 in adjusted position.

In Figure 3 there is shown a modified form of construction in which the inner externally threaded sleeve H5 is a part of or fixed to the disc I20 while the thimble I I 6 is fixed thereto, there being a suitable space between the thimble II 6 and threaded sleeve I I5. In this construction, the internally threaded sleeve I2I adapted to enter the space referred to and coact with the threads on sleeve H5, is fixed in adjusted position on standard ID by a suitable pointed screw H8.

3 In other respects this form of the device may be the same as that of Figures 1 and 2.

Now'having described the invention and the preferred embodiments thereof, it is to be understood that the invention is to be limited, not to the specificdetails herein set forth, but only by the scope of the claims which follow:

I claim:

l. A heightgauge comprising a cylindrical standard, a base therefor having its under surface normal to the axis of said standard, and a slider movable on said standard, said slider consisting of an externally threaded sleeve having a sliding fit on said standard, means for fixing said slider to said standard and against rotation thereon and a plate provided with an, opening to the axis of said ,standardandmeansior fixing said plate againstmovement on'said standard.

4. A height gauge comprising a cylindrical standard, a base therefor having its under surface normal to the axis of said standard, and a slider movable on said standard, said slider con- ,sisting ofan externally threaded sleeve having for the passage of said standard and with an internally threaded sleeve portion adapted to coact with the first mentioned sleeve whereby to elevate or lower said plate.

2. A height gauge comprising a cylindrical standard having 9, plurality of equally spaced V-grooves, a 'base'therefor having its under surface normal to the axis of said standard, and a slider movable onsaid standard, said slider consisting 'ofan externally threaded sleeve having a sliding-fit on said standard'and provided with a pointed screw: adaptedto coact with one of said V-grooves to fix said sleeve against movement on said standard, and a plate having an opening for. the passage of ,said standard: and an' internally threadedjsleeve portion around said openingiadaptedto coact with the externally threaded sleeve-to elevate or lower said plate, the latter having its upper and lower surfaces also-normal to the axis of said standard.

,3. A height gauge comprisinga cylindrical standard having a plurality of equally spaced V-grooves, a base therefor having its under sur-' face normal'to the axis of said standard, and a slider movable on saidrstandard, said slider consistingof an externally threaded sleeve having" a sliding fit on said standard and a plate having 'an opening for the'passage of said standard and an internally threaded sleeve portion adapted to coact with the first mentioned sleeve, said sleeves being provided with graduations whereby to indicate the relative positions thereof.

5. A height gauge comprising a cylindrical standard having a plurality of equally spaced V-grooves, a, base therefor having its under surface normal to the axis of said standard, and a slider movable on said standard, said'slid'er consisting of .an externally threaded sleeve having V-grooves to fix said sleeve against movement on said standard, a plate having an opening for the passage of said standard, an internally threaded sleeve portion around said opening 1 adapted to coact with the externally threaded sleeve to elevate or lower said plate, the latter. having its upper and lower surfaces also normal to the axis of said standard and means for fixing said plate against movement on said standard, said sleeves being provided with graduations whereby to indicate the relative positions thereof.

a ANTHONY J. METRO. 

